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Diffstat (limited to 'src/imports/shaders/scenegraph/qsggeometry.cpp')
| -rw-r--r-- | src/imports/shaders/scenegraph/qsggeometry.cpp | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/src/imports/shaders/scenegraph/qsggeometry.cpp b/src/imports/shaders/scenegraph/qsggeometry.cpp new file mode 100644 index 00000000..371b6e88 --- /dev/null +++ b/src/imports/shaders/scenegraph/qsggeometry.cpp @@ -0,0 +1,194 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QML Shaders plugin of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** This file may be used under the terms of the GNU Lesser General Public +** License version 2.1 as published by the Free Software Foundation and +** appearing in the file LICENSE.LGPL included in the packaging of this +** file. Please review the following information to ensure the GNU Lesser +** General Public License version 2.1 requirements will be met: +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qsggeometry.h" + +QT_BEGIN_NAMESPACE + + +const QSGGeometry::AttributeSet &QSGGeometry::defaultAttributes_Point2D() +{ + static Attribute data[] = { + { 0, 2, GL_FLOAT } + }; + static AttributeSet attrs = { 1, sizeof(float) * 2, data }; + return attrs; +} + + +const QSGGeometry::AttributeSet &QSGGeometry::defaultAttributes_TexturedPoint2D() +{ + static Attribute data[] = { + { 0, 2, GL_FLOAT }, + { 1, 2, GL_FLOAT } + }; + static AttributeSet attrs = { 2, sizeof(float) * 4, data }; + return attrs; +} + + +const QSGGeometry::AttributeSet &QSGGeometry::defaultAttributes_ColoredPoint2D() +{ + static Attribute data[] = { + { 0, 2, GL_FLOAT }, + { 1, 4, GL_UNSIGNED_BYTE } + }; + static AttributeSet attrs = { 2, 2 * sizeof(float) + 4 * sizeof(char), data }; + return attrs; +} + + + +QSGGeometry::QSGGeometry(const QSGGeometry::AttributeSet &attributes, + int vertexCount, + int indexCount, + int indexType) + : m_drawing_mode(GL_TRIANGLE_STRIP) + , m_vertex_count(0) + , m_index_count(0) + , m_index_type(indexType) + , m_attributes(attributes) + , m_data(0) + , m_index_data_offset(-1) + , m_owns_data(false) +{ + Q_ASSERT(m_attributes.count > 0); + Q_ASSERT(m_attributes.stride > 0); + + // Because allocate reads m_vertex_count, m_index_count and m_owns_data, these + // need to be set before calling allocate... + allocate(vertexCount, indexCount); +} + +QSGGeometry::~QSGGeometry() +{ + if (m_owns_data) + qFree(m_data); +} + +void *QSGGeometry::indexData() +{ + return m_index_data_offset < 0 + ? 0 + : ((char *) m_data + m_index_data_offset); +} + +const void *QSGGeometry::indexData() const +{ + return m_index_data_offset < 0 + ? 0 + : ((char *) m_data + m_index_data_offset); +} + +void QSGGeometry::setDrawingMode(GLenum mode) +{ + m_drawing_mode = mode; +} + +void QSGGeometry::allocate(int vertexCount, int indexCount) +{ + if (vertexCount == m_vertex_count && indexCount == m_index_count) + return; + + m_vertex_count = vertexCount; + m_index_count = indexCount; + + bool canUsePrealloc = m_index_count <= 0; + int vertexByteSize = m_attributes.stride * m_vertex_count; + + if (m_owns_data) + qFree(m_data); + + if (canUsePrealloc && vertexByteSize <= (int) sizeof(m_prealloc)) { + m_data = (void *) &m_prealloc[0]; + m_index_data_offset = -1; + m_owns_data = false; + } else { + Q_ASSERT(m_index_type == GL_UNSIGNED_INT || m_index_type == GL_UNSIGNED_SHORT); + int indexByteSize = indexCount * (m_index_type == GL_UNSIGNED_SHORT ? sizeof(quint16) : sizeof(quint32)); + m_data = (void *) qMalloc(vertexByteSize + indexByteSize); + m_index_data_offset = vertexByteSize; + m_owns_data = true; + } + +} + +void QSGGeometry::updateRectGeometry(QSGGeometry *g, const QRectF &rect) +{ + Point2D *v = g->vertexDataAsPoint2D(); + v[0].x = rect.left(); + v[0].y = rect.top(); + + v[1].x = rect.right(); + v[1].y = rect.top(); + + v[2].x = rect.left(); + v[2].y = rect.bottom(); + + v[3].x = rect.right(); + v[3].y = rect.bottom(); +} + +void QSGGeometry::updateTexturedRectGeometry(QSGGeometry *g, const QRectF &rect, const QRectF &textureRect) +{ + TexturedPoint2D *v = g->vertexDataAsTexturedPoint2D(); + v[0].x = rect.left(); + v[0].y = rect.top(); + v[0].tx = textureRect.left(); + v[0].ty = textureRect.top(); + + v[1].x = rect.right(); + v[1].y = rect.top(); + v[1].tx = textureRect.right(); + v[1].ty = textureRect.top(); + + v[2].x = rect.left(); + v[2].y = rect.bottom(); + v[2].tx = textureRect.left(); + v[2].ty = textureRect.bottom(); + + v[3].x = rect.right(); + v[3].y = rect.bottom(); + v[3].tx = textureRect.right(); + v[3].ty = textureRect.bottom(); +} + +QT_END_NAMESPACE |